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Related Experiment Videos

Hippocampal formations imaging with axial sections parallel to their longitudinal axis

J Beaurain1, D Dormont, F Semah

  • 1Laboratoire d'Anatomie, Faculté de Médecine Pitié-Salpétrière, Paris, France.

Magnetic Resonance Imaging
|January 1, 1994
PubMed
Summary

Analyzing the hippocampal formation (HF) is challenging due to its complex shape. The hippocampal axial plane (HAP) offers a clear view for morphological and functional imaging analysis of the HF.

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Area of Science:

  • Neuroimaging
  • Neuroanatomy
  • Medical Imaging

Background:

  • The complex morphology and obliquity of the hippocampal formation (HF) pose challenges for accurate analysis using standard brain imaging techniques.
  • Specialized planes of section are necessary to obtain comprehensive views of the HF structure.

Purpose of the Study:

  • To introduce and validate the hippocampal axial plane (HAP) as an optimal orientation for the morphological and functional analysis of the hippocampal formation.
  • To demonstrate the utility of the HAP in conjunction with various neuroimaging modalities.

Main Methods:

  • Utilizing adapted planes of section, specifically the hippocampal axial plane (HAP), parallel to the HF's long axis.
  • Correlating histological section patterns with anatomical landmarks within the HAP.

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  • Integrating functional imaging techniques such as MRI, PET, and SPECT with the HAP orientation.

    • Main Results:

    • The HAP provides a complete and comprehensive view of the HF, clearly displaying cell layer patterns and transversal folding in the head and tail.
    • Ventral sections in the HAP reveal the CA1 field and subicular complex, while dorsal sections show the amygdala, uncus, and fimbria.
    • The HAP facilitates accurate definition of functional HF images by combining MRI, PET, or SPECT, requiring only a few slices for complete coverage.

    Conclusions:

    • The hippocampal axial plane (HAP) is an effective orientation for detailed morphological and functional imaging of the hippocampal formation.
    • This approach simplifies the outlining of precise regions of interest within the HF, improving the accuracy of neuroimaging studies.